A plastic disk of radius R = 31.7 cm is charged on one side with a uniform surface charge density 5.44 fC/m, and then three quadrants of the disk are removed. The remaining quadrant is shown in the figure. With V=0 at infinity, what is the potential in volts due to the remaining quadrant at point P, which is on the central axis of the original disk at distance D = 0.187 cm from the original center? P.T D